1
2
3
4
5
6
7
8
9
10
11
12
13#include <linux/module.h>
14#include <linux/kernel.h>
15#include <linux/types.h>
16#include <linux/errno.h>
17#include <linux/bug.h>
18#include <linux/interrupt.h>
19#include <linux/workqueue.h>
20#include <linux/device.h>
21#include <linux/platform_device.h>
22#include <linux/list.h>
23#include <linux/io.h>
24#include <linux/slab.h>
25#include <linux/clk.h>
26
27#include <media/v4l2-ioctl.h>
28
29#include "gsc-core.h"
30
31static int gsc_m2m_ctx_stop_req(struct gsc_ctx *ctx)
32{
33 struct gsc_ctx *curr_ctx;
34 struct gsc_dev *gsc = ctx->gsc_dev;
35 int ret;
36
37 curr_ctx = v4l2_m2m_get_curr_priv(gsc->m2m.m2m_dev);
38 if (!gsc_m2m_pending(gsc) || (curr_ctx != ctx))
39 return 0;
40
41 gsc_ctx_state_lock_set(GSC_CTX_STOP_REQ, ctx);
42 ret = wait_event_timeout(gsc->irq_queue,
43 !gsc_ctx_state_is_set(GSC_CTX_STOP_REQ, ctx),
44 GSC_SHUTDOWN_TIMEOUT);
45
46 return ret == 0 ? -ETIMEDOUT : ret;
47}
48
49static void __gsc_m2m_job_abort(struct gsc_ctx *ctx)
50{
51 int ret;
52
53 ret = gsc_m2m_ctx_stop_req(ctx);
54 if ((ret == -ETIMEDOUT) || (ctx->state & GSC_CTX_ABORT)) {
55 gsc_ctx_state_lock_clear(GSC_CTX_STOP_REQ | GSC_CTX_ABORT, ctx);
56 gsc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
57 }
58}
59
60static int gsc_m2m_start_streaming(struct vb2_queue *q, unsigned int count)
61{
62 struct gsc_ctx *ctx = q->drv_priv;
63 int ret;
64
65 ret = pm_runtime_get_sync(&ctx->gsc_dev->pdev->dev);
66 return ret > 0 ? 0 : ret;
67}
68
69static void gsc_m2m_stop_streaming(struct vb2_queue *q)
70{
71 struct gsc_ctx *ctx = q->drv_priv;
72
73 __gsc_m2m_job_abort(ctx);
74
75 pm_runtime_put(&ctx->gsc_dev->pdev->dev);
76}
77
78void gsc_m2m_job_finish(struct gsc_ctx *ctx, int vb_state)
79{
80 struct vb2_buffer *src_vb, *dst_vb;
81
82 if (!ctx || !ctx->m2m_ctx)
83 return;
84
85 src_vb = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
86 dst_vb = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
87
88 if (src_vb && dst_vb) {
89 dst_vb->v4l2_buf.timestamp = src_vb->v4l2_buf.timestamp;
90 dst_vb->v4l2_buf.timecode = src_vb->v4l2_buf.timecode;
91 dst_vb->v4l2_buf.flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
92 dst_vb->v4l2_buf.flags |=
93 src_vb->v4l2_buf.flags
94 & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
95
96 v4l2_m2m_buf_done(src_vb, vb_state);
97 v4l2_m2m_buf_done(dst_vb, vb_state);
98
99 v4l2_m2m_job_finish(ctx->gsc_dev->m2m.m2m_dev,
100 ctx->m2m_ctx);
101 }
102}
103
104static void gsc_m2m_job_abort(void *priv)
105{
106 __gsc_m2m_job_abort((struct gsc_ctx *)priv);
107}
108
109static int gsc_get_bufs(struct gsc_ctx *ctx)
110{
111 struct gsc_frame *s_frame, *d_frame;
112 struct vb2_buffer *src_vb, *dst_vb;
113 int ret;
114
115 s_frame = &ctx->s_frame;
116 d_frame = &ctx->d_frame;
117
118 src_vb = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
119 ret = gsc_prepare_addr(ctx, src_vb, s_frame, &s_frame->addr);
120 if (ret)
121 return ret;
122
123 dst_vb = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
124 ret = gsc_prepare_addr(ctx, dst_vb, d_frame, &d_frame->addr);
125 if (ret)
126 return ret;
127
128 dst_vb->v4l2_buf.timestamp = src_vb->v4l2_buf.timestamp;
129
130 return 0;
131}
132
133static void gsc_m2m_device_run(void *priv)
134{
135 struct gsc_ctx *ctx = priv;
136 struct gsc_dev *gsc;
137 unsigned long flags;
138 int ret;
139 bool is_set = false;
140
141 if (WARN(!ctx, "null hardware context\n"))
142 return;
143
144 gsc = ctx->gsc_dev;
145 spin_lock_irqsave(&gsc->slock, flags);
146
147 set_bit(ST_M2M_PEND, &gsc->state);
148
149
150 if (gsc->m2m.ctx != ctx) {
151 pr_debug("gsc->m2m.ctx = 0x%p, current_ctx = 0x%p",
152 gsc->m2m.ctx, ctx);
153 ctx->state |= GSC_PARAMS;
154 gsc->m2m.ctx = ctx;
155 }
156
157 is_set = ctx->state & GSC_CTX_STOP_REQ;
158 if (is_set) {
159 ctx->state &= ~GSC_CTX_STOP_REQ;
160 ctx->state |= GSC_CTX_ABORT;
161 wake_up(&gsc->irq_queue);
162 goto put_device;
163 }
164
165 ret = gsc_get_bufs(ctx);
166 if (ret) {
167 pr_err("Wrong address");
168 goto put_device;
169 }
170
171 gsc_set_prefbuf(gsc, &ctx->s_frame);
172 gsc_hw_set_input_addr(gsc, &ctx->s_frame.addr, GSC_M2M_BUF_NUM);
173 gsc_hw_set_output_addr(gsc, &ctx->d_frame.addr, GSC_M2M_BUF_NUM);
174
175 if (ctx->state & GSC_PARAMS) {
176 gsc_hw_set_input_buf_masking(gsc, GSC_M2M_BUF_NUM, false);
177 gsc_hw_set_output_buf_masking(gsc, GSC_M2M_BUF_NUM, false);
178 gsc_hw_set_frm_done_irq_mask(gsc, false);
179 gsc_hw_set_gsc_irq_enable(gsc, true);
180
181 if (gsc_set_scaler_info(ctx)) {
182 pr_err("Scaler setup error");
183 goto put_device;
184 }
185
186 gsc_hw_set_input_path(ctx);
187 gsc_hw_set_in_size(ctx);
188 gsc_hw_set_in_image_format(ctx);
189
190 gsc_hw_set_output_path(ctx);
191 gsc_hw_set_out_size(ctx);
192 gsc_hw_set_out_image_format(ctx);
193
194 gsc_hw_set_prescaler(ctx);
195 gsc_hw_set_mainscaler(ctx);
196 gsc_hw_set_rotation(ctx);
197 gsc_hw_set_global_alpha(ctx);
198 }
199
200
201 gsc_hw_set_sfr_update(ctx);
202
203 ctx->state &= ~GSC_PARAMS;
204 gsc_hw_enable_control(gsc, true);
205
206 spin_unlock_irqrestore(&gsc->slock, flags);
207 return;
208
209put_device:
210 ctx->state &= ~GSC_PARAMS;
211 spin_unlock_irqrestore(&gsc->slock, flags);
212}
213
214static int gsc_m2m_queue_setup(struct vb2_queue *vq,
215 const struct v4l2_format *fmt,
216 unsigned int *num_buffers, unsigned int *num_planes,
217 unsigned int sizes[], void *allocators[])
218{
219 struct gsc_ctx *ctx = vb2_get_drv_priv(vq);
220 struct gsc_frame *frame;
221 int i;
222
223 frame = ctx_get_frame(ctx, vq->type);
224 if (IS_ERR(frame))
225 return PTR_ERR(frame);
226
227 if (!frame->fmt)
228 return -EINVAL;
229
230 *num_planes = frame->fmt->num_planes;
231 for (i = 0; i < frame->fmt->num_planes; i++) {
232 sizes[i] = frame->payload[i];
233 allocators[i] = ctx->gsc_dev->alloc_ctx;
234 }
235 return 0;
236}
237
238static int gsc_m2m_buf_prepare(struct vb2_buffer *vb)
239{
240 struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
241 struct gsc_frame *frame;
242 int i;
243
244 frame = ctx_get_frame(ctx, vb->vb2_queue->type);
245 if (IS_ERR(frame))
246 return PTR_ERR(frame);
247
248 if (!V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
249 for (i = 0; i < frame->fmt->num_planes; i++)
250 vb2_set_plane_payload(vb, i, frame->payload[i]);
251 }
252
253 return 0;
254}
255
256static void gsc_m2m_buf_queue(struct vb2_buffer *vb)
257{
258 struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
259
260 pr_debug("ctx: %p, ctx->state: 0x%x", ctx, ctx->state);
261
262 if (ctx->m2m_ctx)
263 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
264}
265
266static struct vb2_ops gsc_m2m_qops = {
267 .queue_setup = gsc_m2m_queue_setup,
268 .buf_prepare = gsc_m2m_buf_prepare,
269 .buf_queue = gsc_m2m_buf_queue,
270 .wait_prepare = vb2_ops_wait_prepare,
271 .wait_finish = vb2_ops_wait_finish,
272 .stop_streaming = gsc_m2m_stop_streaming,
273 .start_streaming = gsc_m2m_start_streaming,
274};
275
276static int gsc_m2m_querycap(struct file *file, void *fh,
277 struct v4l2_capability *cap)
278{
279 struct gsc_ctx *ctx = fh_to_ctx(fh);
280 struct gsc_dev *gsc = ctx->gsc_dev;
281
282 strlcpy(cap->driver, gsc->pdev->name, sizeof(cap->driver));
283 strlcpy(cap->card, gsc->pdev->name, sizeof(cap->card));
284 strlcpy(cap->bus_info, "platform", sizeof(cap->bus_info));
285 cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE |
286 V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
287
288 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
289 return 0;
290}
291
292static int gsc_m2m_enum_fmt_mplane(struct file *file, void *priv,
293 struct v4l2_fmtdesc *f)
294{
295 return gsc_enum_fmt_mplane(f);
296}
297
298static int gsc_m2m_g_fmt_mplane(struct file *file, void *fh,
299 struct v4l2_format *f)
300{
301 struct gsc_ctx *ctx = fh_to_ctx(fh);
302
303 return gsc_g_fmt_mplane(ctx, f);
304}
305
306static int gsc_m2m_try_fmt_mplane(struct file *file, void *fh,
307 struct v4l2_format *f)
308{
309 struct gsc_ctx *ctx = fh_to_ctx(fh);
310
311 return gsc_try_fmt_mplane(ctx, f);
312}
313
314static int gsc_m2m_s_fmt_mplane(struct file *file, void *fh,
315 struct v4l2_format *f)
316{
317 struct gsc_ctx *ctx = fh_to_ctx(fh);
318 struct vb2_queue *vq;
319 struct gsc_frame *frame;
320 struct v4l2_pix_format_mplane *pix;
321 int i, ret = 0;
322
323 ret = gsc_m2m_try_fmt_mplane(file, fh, f);
324 if (ret)
325 return ret;
326
327 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
328
329 if (vb2_is_streaming(vq)) {
330 pr_err("queue (%d) busy", f->type);
331 return -EBUSY;
332 }
333
334 if (V4L2_TYPE_IS_OUTPUT(f->type))
335 frame = &ctx->s_frame;
336 else
337 frame = &ctx->d_frame;
338
339 pix = &f->fmt.pix_mp;
340 frame->fmt = find_fmt(&pix->pixelformat, NULL, 0);
341 frame->colorspace = pix->colorspace;
342 if (!frame->fmt)
343 return -EINVAL;
344
345 for (i = 0; i < frame->fmt->num_planes; i++)
346 frame->payload[i] = pix->plane_fmt[i].sizeimage;
347
348 gsc_set_frame_size(frame, pix->width, pix->height);
349
350 if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
351 gsc_ctx_state_lock_set(GSC_PARAMS | GSC_DST_FMT, ctx);
352 else
353 gsc_ctx_state_lock_set(GSC_PARAMS | GSC_SRC_FMT, ctx);
354
355 pr_debug("f_w: %d, f_h: %d", frame->f_width, frame->f_height);
356
357 return 0;
358}
359
360static int gsc_m2m_reqbufs(struct file *file, void *fh,
361 struct v4l2_requestbuffers *reqbufs)
362{
363 struct gsc_ctx *ctx = fh_to_ctx(fh);
364 struct gsc_dev *gsc = ctx->gsc_dev;
365 u32 max_cnt;
366
367 max_cnt = (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ?
368 gsc->variant->in_buf_cnt : gsc->variant->out_buf_cnt;
369 if (reqbufs->count > max_cnt) {
370 return -EINVAL;
371 } else if (reqbufs->count == 0) {
372 if (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
373 gsc_ctx_state_lock_clear(GSC_SRC_FMT, ctx);
374 else
375 gsc_ctx_state_lock_clear(GSC_DST_FMT, ctx);
376 }
377
378 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
379}
380
381static int gsc_m2m_expbuf(struct file *file, void *fh,
382 struct v4l2_exportbuffer *eb)
383{
384 struct gsc_ctx *ctx = fh_to_ctx(fh);
385 return v4l2_m2m_expbuf(file, ctx->m2m_ctx, eb);
386}
387
388static int gsc_m2m_querybuf(struct file *file, void *fh,
389 struct v4l2_buffer *buf)
390{
391 struct gsc_ctx *ctx = fh_to_ctx(fh);
392 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
393}
394
395static int gsc_m2m_qbuf(struct file *file, void *fh,
396 struct v4l2_buffer *buf)
397{
398 struct gsc_ctx *ctx = fh_to_ctx(fh);
399 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
400}
401
402static int gsc_m2m_dqbuf(struct file *file, void *fh,
403 struct v4l2_buffer *buf)
404{
405 struct gsc_ctx *ctx = fh_to_ctx(fh);
406 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
407}
408
409static int gsc_m2m_streamon(struct file *file, void *fh,
410 enum v4l2_buf_type type)
411{
412 struct gsc_ctx *ctx = fh_to_ctx(fh);
413
414
415 if (V4L2_TYPE_IS_OUTPUT(type)) {
416 if (!gsc_ctx_state_is_set(GSC_SRC_FMT, ctx))
417 return -EINVAL;
418 } else if (!gsc_ctx_state_is_set(GSC_DST_FMT, ctx)) {
419 return -EINVAL;
420 }
421
422 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
423}
424
425static int gsc_m2m_streamoff(struct file *file, void *fh,
426 enum v4l2_buf_type type)
427{
428 struct gsc_ctx *ctx = fh_to_ctx(fh);
429 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
430}
431
432
433static int is_rectangle_enclosed(struct v4l2_rect *a, struct v4l2_rect *b)
434{
435 if (a->left < b->left || a->top < b->top)
436 return 0;
437
438 if (a->left + a->width > b->left + b->width)
439 return 0;
440
441 if (a->top + a->height > b->top + b->height)
442 return 0;
443
444 return 1;
445}
446
447static int gsc_m2m_g_selection(struct file *file, void *fh,
448 struct v4l2_selection *s)
449{
450 struct gsc_frame *frame;
451 struct gsc_ctx *ctx = fh_to_ctx(fh);
452
453 if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) &&
454 (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
455 return -EINVAL;
456
457 frame = ctx_get_frame(ctx, s->type);
458 if (IS_ERR(frame))
459 return PTR_ERR(frame);
460
461 switch (s->target) {
462 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
463 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
464 case V4L2_SEL_TGT_CROP_BOUNDS:
465 case V4L2_SEL_TGT_CROP_DEFAULT:
466 s->r.left = 0;
467 s->r.top = 0;
468 s->r.width = frame->f_width;
469 s->r.height = frame->f_height;
470 return 0;
471
472 case V4L2_SEL_TGT_COMPOSE:
473 case V4L2_SEL_TGT_CROP:
474 s->r.left = frame->crop.left;
475 s->r.top = frame->crop.top;
476 s->r.width = frame->crop.width;
477 s->r.height = frame->crop.height;
478 return 0;
479 }
480
481 return -EINVAL;
482}
483
484static int gsc_m2m_s_selection(struct file *file, void *fh,
485 struct v4l2_selection *s)
486{
487 struct gsc_frame *frame;
488 struct gsc_ctx *ctx = fh_to_ctx(fh);
489 struct v4l2_crop cr;
490 struct gsc_variant *variant = ctx->gsc_dev->variant;
491 int ret;
492
493 cr.type = s->type;
494 cr.c = s->r;
495
496 if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) &&
497 (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
498 return -EINVAL;
499
500 ret = gsc_try_crop(ctx, &cr);
501 if (ret)
502 return ret;
503
504 if (s->flags & V4L2_SEL_FLAG_LE &&
505 !is_rectangle_enclosed(&cr.c, &s->r))
506 return -ERANGE;
507
508 if (s->flags & V4L2_SEL_FLAG_GE &&
509 !is_rectangle_enclosed(&s->r, &cr.c))
510 return -ERANGE;
511
512 s->r = cr.c;
513
514 switch (s->target) {
515 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
516 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
517 case V4L2_SEL_TGT_COMPOSE:
518 frame = &ctx->s_frame;
519 break;
520
521 case V4L2_SEL_TGT_CROP_BOUNDS:
522 case V4L2_SEL_TGT_CROP:
523 case V4L2_SEL_TGT_CROP_DEFAULT:
524 frame = &ctx->d_frame;
525 break;
526
527 default:
528 return -EINVAL;
529 }
530
531
532 if (gsc_ctx_state_is_set(GSC_DST_FMT | GSC_SRC_FMT, ctx)) {
533 if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
534 ret = gsc_check_scaler_ratio(variant, cr.c.width,
535 cr.c.height, ctx->d_frame.crop.width,
536 ctx->d_frame.crop.height,
537 ctx->gsc_ctrls.rotate->val, ctx->out_path);
538 } else {
539 ret = gsc_check_scaler_ratio(variant,
540 ctx->s_frame.crop.width,
541 ctx->s_frame.crop.height, cr.c.width,
542 cr.c.height, ctx->gsc_ctrls.rotate->val,
543 ctx->out_path);
544 }
545
546 if (ret) {
547 pr_err("Out of scaler range");
548 return -EINVAL;
549 }
550 }
551
552 frame->crop = cr.c;
553
554 gsc_ctx_state_lock_set(GSC_PARAMS, ctx);
555 return 0;
556}
557
558static const struct v4l2_ioctl_ops gsc_m2m_ioctl_ops = {
559 .vidioc_querycap = gsc_m2m_querycap,
560 .vidioc_enum_fmt_vid_cap_mplane = gsc_m2m_enum_fmt_mplane,
561 .vidioc_enum_fmt_vid_out_mplane = gsc_m2m_enum_fmt_mplane,
562 .vidioc_g_fmt_vid_cap_mplane = gsc_m2m_g_fmt_mplane,
563 .vidioc_g_fmt_vid_out_mplane = gsc_m2m_g_fmt_mplane,
564 .vidioc_try_fmt_vid_cap_mplane = gsc_m2m_try_fmt_mplane,
565 .vidioc_try_fmt_vid_out_mplane = gsc_m2m_try_fmt_mplane,
566 .vidioc_s_fmt_vid_cap_mplane = gsc_m2m_s_fmt_mplane,
567 .vidioc_s_fmt_vid_out_mplane = gsc_m2m_s_fmt_mplane,
568 .vidioc_reqbufs = gsc_m2m_reqbufs,
569 .vidioc_expbuf = gsc_m2m_expbuf,
570 .vidioc_querybuf = gsc_m2m_querybuf,
571 .vidioc_qbuf = gsc_m2m_qbuf,
572 .vidioc_dqbuf = gsc_m2m_dqbuf,
573 .vidioc_streamon = gsc_m2m_streamon,
574 .vidioc_streamoff = gsc_m2m_streamoff,
575 .vidioc_g_selection = gsc_m2m_g_selection,
576 .vidioc_s_selection = gsc_m2m_s_selection
577};
578
579static int queue_init(void *priv, struct vb2_queue *src_vq,
580 struct vb2_queue *dst_vq)
581{
582 struct gsc_ctx *ctx = priv;
583 int ret;
584
585 memset(src_vq, 0, sizeof(*src_vq));
586 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
587 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
588 src_vq->drv_priv = ctx;
589 src_vq->ops = &gsc_m2m_qops;
590 src_vq->mem_ops = &vb2_dma_contig_memops;
591 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
592 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
593 src_vq->lock = &ctx->gsc_dev->lock;
594
595 ret = vb2_queue_init(src_vq);
596 if (ret)
597 return ret;
598
599 memset(dst_vq, 0, sizeof(*dst_vq));
600 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
601 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
602 dst_vq->drv_priv = ctx;
603 dst_vq->ops = &gsc_m2m_qops;
604 dst_vq->mem_ops = &vb2_dma_contig_memops;
605 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
606 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
607 dst_vq->lock = &ctx->gsc_dev->lock;
608
609 return vb2_queue_init(dst_vq);
610}
611
612static int gsc_m2m_open(struct file *file)
613{
614 struct gsc_dev *gsc = video_drvdata(file);
615 struct gsc_ctx *ctx = NULL;
616 int ret;
617
618 pr_debug("pid: %d, state: 0x%lx", task_pid_nr(current), gsc->state);
619
620 if (mutex_lock_interruptible(&gsc->lock))
621 return -ERESTARTSYS;
622
623 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
624 if (!ctx) {
625 ret = -ENOMEM;
626 goto unlock;
627 }
628
629 v4l2_fh_init(&ctx->fh, gsc->m2m.vfd);
630 ret = gsc_ctrls_create(ctx);
631 if (ret)
632 goto error_fh;
633
634
635 ctx->fh.ctrl_handler = &ctx->ctrl_handler;
636 file->private_data = &ctx->fh;
637 v4l2_fh_add(&ctx->fh);
638
639 ctx->gsc_dev = gsc;
640
641 ctx->s_frame.fmt = get_format(0);
642 ctx->d_frame.fmt = get_format(0);
643
644 ctx->state = GSC_CTX_M2M;
645 ctx->flags = 0;
646 ctx->in_path = GSC_DMA;
647 ctx->out_path = GSC_DMA;
648
649 ctx->m2m_ctx = v4l2_m2m_ctx_init(gsc->m2m.m2m_dev, ctx, queue_init);
650 if (IS_ERR(ctx->m2m_ctx)) {
651 pr_err("Failed to initialize m2m context");
652 ret = PTR_ERR(ctx->m2m_ctx);
653 goto error_ctrls;
654 }
655
656 if (gsc->m2m.refcnt++ == 0)
657 set_bit(ST_M2M_OPEN, &gsc->state);
658
659 pr_debug("gsc m2m driver is opened, ctx(0x%p)", ctx);
660
661 mutex_unlock(&gsc->lock);
662 return 0;
663
664error_ctrls:
665 gsc_ctrls_delete(ctx);
666error_fh:
667 v4l2_fh_del(&ctx->fh);
668 v4l2_fh_exit(&ctx->fh);
669 kfree(ctx);
670unlock:
671 mutex_unlock(&gsc->lock);
672 return ret;
673}
674
675static int gsc_m2m_release(struct file *file)
676{
677 struct gsc_ctx *ctx = fh_to_ctx(file->private_data);
678 struct gsc_dev *gsc = ctx->gsc_dev;
679
680 pr_debug("pid: %d, state: 0x%lx, refcnt= %d",
681 task_pid_nr(current), gsc->state, gsc->m2m.refcnt);
682
683 mutex_lock(&gsc->lock);
684
685 v4l2_m2m_ctx_release(ctx->m2m_ctx);
686 gsc_ctrls_delete(ctx);
687 v4l2_fh_del(&ctx->fh);
688 v4l2_fh_exit(&ctx->fh);
689
690 if (--gsc->m2m.refcnt <= 0)
691 clear_bit(ST_M2M_OPEN, &gsc->state);
692 kfree(ctx);
693
694 mutex_unlock(&gsc->lock);
695 return 0;
696}
697
698static unsigned int gsc_m2m_poll(struct file *file,
699 struct poll_table_struct *wait)
700{
701 struct gsc_ctx *ctx = fh_to_ctx(file->private_data);
702 struct gsc_dev *gsc = ctx->gsc_dev;
703 int ret;
704
705 if (mutex_lock_interruptible(&gsc->lock))
706 return -ERESTARTSYS;
707
708 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
709 mutex_unlock(&gsc->lock);
710
711 return ret;
712}
713
714static int gsc_m2m_mmap(struct file *file, struct vm_area_struct *vma)
715{
716 struct gsc_ctx *ctx = fh_to_ctx(file->private_data);
717 struct gsc_dev *gsc = ctx->gsc_dev;
718 int ret;
719
720 if (mutex_lock_interruptible(&gsc->lock))
721 return -ERESTARTSYS;
722
723 ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
724 mutex_unlock(&gsc->lock);
725
726 return ret;
727}
728
729static const struct v4l2_file_operations gsc_m2m_fops = {
730 .owner = THIS_MODULE,
731 .open = gsc_m2m_open,
732 .release = gsc_m2m_release,
733 .poll = gsc_m2m_poll,
734 .unlocked_ioctl = video_ioctl2,
735 .mmap = gsc_m2m_mmap,
736};
737
738static struct v4l2_m2m_ops gsc_m2m_ops = {
739 .device_run = gsc_m2m_device_run,
740 .job_abort = gsc_m2m_job_abort,
741};
742
743int gsc_register_m2m_device(struct gsc_dev *gsc)
744{
745 struct platform_device *pdev;
746 int ret;
747
748 if (!gsc)
749 return -ENODEV;
750
751 pdev = gsc->pdev;
752
753 gsc->vdev.fops = &gsc_m2m_fops;
754 gsc->vdev.ioctl_ops = &gsc_m2m_ioctl_ops;
755 gsc->vdev.release = video_device_release_empty;
756 gsc->vdev.lock = &gsc->lock;
757 gsc->vdev.vfl_dir = VFL_DIR_M2M;
758 gsc->vdev.v4l2_dev = &gsc->v4l2_dev;
759 snprintf(gsc->vdev.name, sizeof(gsc->vdev.name), "%s.%d:m2m",
760 GSC_MODULE_NAME, gsc->id);
761
762 video_set_drvdata(&gsc->vdev, gsc);
763
764 gsc->m2m.vfd = &gsc->vdev;
765 gsc->m2m.m2m_dev = v4l2_m2m_init(&gsc_m2m_ops);
766 if (IS_ERR(gsc->m2m.m2m_dev)) {
767 dev_err(&pdev->dev, "failed to initialize v4l2-m2m device\n");
768 ret = PTR_ERR(gsc->m2m.m2m_dev);
769 goto err_m2m_r1;
770 }
771
772 ret = video_register_device(&gsc->vdev, VFL_TYPE_GRABBER, -1);
773 if (ret) {
774 dev_err(&pdev->dev,
775 "%s(): failed to register video device\n", __func__);
776 goto err_m2m_r2;
777 }
778
779 pr_debug("gsc m2m driver registered as /dev/video%d", gsc->vdev.num);
780 return 0;
781
782err_m2m_r2:
783 v4l2_m2m_release(gsc->m2m.m2m_dev);
784err_m2m_r1:
785 video_device_release(gsc->m2m.vfd);
786
787 return ret;
788}
789
790void gsc_unregister_m2m_device(struct gsc_dev *gsc)
791{
792 if (gsc)
793 v4l2_m2m_release(gsc->m2m.m2m_dev);
794}
795
